US: Full sheet of airmail labels 4

Here is another full sheet from USA.

Year: 1987, Gummed. Günter Mair's catalogue no: - USA-A-26k, perforated 10 ¾, sheets of 80(6x14-4)
4 positions per sheet come with advising text for best use of airmail labels on envelopes, grey-blue/
carmine-red/white, 1*

  























Year: 1987, Gummed. Günter Mair's catalogue no: - USA-A-26l/m, perforated 10 ¾, labels in lower left
position with ref.: "Label  19,  1974" / "✩ GPO:  1987-197-369", grey-blue/carmine-red/white, 2**